Erro ao gerar PDF

[rg3915]

@thiagopena
Ao gerar PDF a partir da tela de orçamentos

Com Django 2.2.11 dá o seguinte erro:

File "~/djangoSIGE/.venv/lib/python3.7/site-packages/django/utils/functional.py", line 80, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "~/djangoSIGE/.venv/lib/python3.7/site-packages/django/db/models/lookups.py", line 118, in contains_aggregate
    return self.lhs.contains_aggregate or getattr(self.rhs, 'contains_aggregate', False)
RecursionError: maximum recursion depth exceeded while calling a Python object

Com Django 3.0.4 ele dá o erro:

Thread 0x00007f353b626080 (most recent call first):
  File "~/djangoSIGE/.venv/lib/python3.7/site-packages/django/utils/autoreload.py", line 355 in tick
  File "~/djangoSIGE/.venv/lib/python3.7/site-packages/django/utils/autoreload.py", line 305 in run_loop
  File "~/djangoSIGE/.venv/lib/python3.7/site-packages/django/utils/autoreload.py", line 299 in run
  File "~/djangoSIGE/.venv/lib/python3.7/site-packages/django/utils/autoreload.py", line 584 in start_django
  File "~/djangoSIGE/.venv/lib/python3.7/site-packages/django/utils/autoreload.py", line 599 in run_with_reloader
  File "~/djangoSIGE/.venv/lib/python3.7/site-packages/django/core/management/commands/runserver.py", line 102 in run
  File "~/djangoSIGE/.venv/lib/python3.7/site-packages/django/core/management/commands/runserver.py", line 95 in handle
  File "~/djangoSIGE/.venv/lib/python3.7/site-packages/django/core/management/base.py", line 369 in execute
  File "~/djangoSIGE/.venv/lib/python3.7/site-packages/django/core/management/commands/runserver.py", line 60 in execute
  File "~/djangoSIGE/.venv/lib/python3.7/site-packages/django/core/management/base.py", line 328 in run_from_argv
  File "~/djangoSIGE/.venv/lib/python3.7/site-packages/django/core/management/__init__.py", line 395 in execute
  File "~/djangoSIGE/.venv/lib/python3.7/site-packages/django/core/management/__init__.py", line 401 in execute_from_command_line
  File "~/djangoSIGE/.venv/../manage.py", line 23 in <module>

[mod64bits]

nem uma solução?